1 min synthesis of phase pure nanocrystalline high-entropy sulfides for efficient water electrolysis

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Zander, Judith ; Marschall, Roland:
1 min synthesis of phase pure nanocrystalline high-entropy sulfides for efficient water electrolysis.
In: EcoEnergy. (2025) Heft 2 . - S. 482-498.
ISSN 2835-9380
DOI: https://doi.org/10.1002/ece2.91

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Abstract

The development of noble-metal free electrocatalysts with low production cost is of utmost importance for sustainable water electrolysis. Herein, we present a fast flexible synthesis pathway for the preparation of a variety of different medium- and high-entropy spinel sulfides of various compositions, using a non-aqueous microwave-assisted synthesis without any H2S. Nanoparticulate high-entropy sulfides containing up to 8 different metal cations can be obtained after an extremely short synthesis time of only 1 min and comparatively low temperatures of 200?230°C. We further demonstrate the high activity of the obtained sulfides for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER).